Diamond Core of Koa'ki Meiru | Decks and Tips

This page notes details of Diamond Core of Koa'ki Meiru (Spell Card/Normal) : decks, tips, effect and rulings. Learn and enjoy playing Yu-Gi-Oh! Duel Links!
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update 06/08/2020

Diamond Core of Koa'ki Meiru

Diamond Core of Koaki Meiru
TypeSpell Card
Card Effect TypeCard effect / Ignition-like Effect
ArchetypesKoa'ki Meiru
Supports ArchetypesKoa'ki Meiru


Add 1 "Koa'ki Meiru" card from your Deck to your hand, except "Diamond Core of Koa'ki Meiru". You can banish this card from your Graveyard; for the rest of this turn, "Koa'ki Meiru" monsters you control cannot be destroyed.

How to Get

PackRevolution Beginning [SR]
Level-up reward--
Victory against--
Card trader--




  • Can search any Koa’ki Meiru card.
  • Can protect your Koa’ki Meiru monsters from destruction for one turn.


  • Protection effect can only be activated during your Main Phase and ends during your End Phase.


  • You can use this card to prevent all your Koa’ki Meiru monster from destroying themselves for 1 turn.

Koa’ki Meiru Crusader

When Koa’ki Meiru Crusader destroys a monster by battle he can retrieve a Koa’ki Meiru card from your graveyard. Use this to retrieve Diamond Core of Koa’ki Meiru for more searches.

Iron Core of Koa’ki Meiru

Iron Core of Koa’ki Meiru is the key card of many Koa’ki Meiru decks so search it out with Diamond Core of Koa’ki Meiru. And with Iron Core of Koa’ki Meiru in your hand you will have access to support like Iron Core Luster and Iron Core Specimen Lab.

Decks [Updated]

Koa'ki Meiru Deck



ActionsAdds from Deck to hand
Banished categoriesBanishes itself from Graveyard for cost
Monster/Spell/Trap categoriesCannot be destroyed by card effects
Attack categoriesCannot be destroyed by battle


Hot New Top

Koa'ki Meiru Rooklord Ice deck
Damn. R.I.P.
my Mom is my GF
dear konami,

we need...
Ruby core of koa'ki meiru,
Emerald core of koa'ki meiru,
Topaz core of koa'ki meiru,
Sapphire core of koa'ki meiru,
Opal core of koa'ki meiru
The META has diversity because:

We have Electromagnets.
We have Six Samurais.
We have Blue-eyes
We have Red-eyes
We have Neos Fusion
We have Koa'ki Meiru
We have Survival's End
We have TRIAMIDS (F2P and can climb in DAY 1)
We have Dark Magician
We have Mermails
We have Subterrors
We have Ancient Gears
We have Crystrons
We have Cyber Dragon Beatdown + King of the Swamp
We have Gem Knights
un-limit MAXUMUS pls .
<< Anonymous(Anti-Mage)
Anonymous Reply
XD heck no
<< Anonymous(Anti-Mage)
Anonymous Reply
laughing at idiots
Koa'ki Meiru are actually stronger now thanks to 3 Iron Cores.

Btw, they are going to limit diamond because Koa'ki Meiru ALREADY topped competitions such as the KC CUP and the WCS. It's an archetype that already had its time to shine, it's been meta for more than 5 months.
<< Anonymous(laughing at idiots)
Anonymous Reply
Time in the meta means nothing, just look at how long Spellbooks and Anazoness lasted
<< Anonymous(laughing at idiots)
Anonymous Reply
Even better then, it only means that koa'ki meiru will be playable forever.

Spellbooks topped the last WCS.
Seriously, they need to press charges against he idiot who owns this website and close it. We need real information, not this piece of trash full of trolls.
Why TF did the un-limit the free card, and limit the box SR card? Many players invested in three copies.
<< Anonymous
Anonymous Reply
Bcus the box is old enough to have served its purpose, and with Neos-Koaki dominating the championship season they had to hit the deck someway- and since they won’t hit Neos Fusion they had to hit Diamond Core
Omg I just need 2 copies of it ! I got 2000 GEMS ! ... spent 8k gems already in Revolution Beginning... oh please please, I need 2 copies of the card haha ^^
<< Anonymous
Anonymous Reply
One more to go ! still have 200 gems ^^
<< Anonymous
Anonymous Reply
Congratulations pal!! But you really need 3 copies of it
<< Anonymous
Anonymous Reply
It is a trap
I just got ripped off by Konami!

I bought this during SR sale guarantee now it is semi-limited!
<< Anonymous
Anonymous Reply
What? SR sale only give you 1 copy. You can still put 2 copies into your deck.
<< Anonymous
Anonymous Reply
<< Anonymous
Anonymous Reply
lol looks like i wasted my Dream Ticket on nothing

DAMN you Komoney
Yes! This should replace Iron Core in the limited list!
Need some answer with the ruling of this card.
Is this card chainable? (enemy activate treacherous then you activate this card)
Can you activate this card at enemy turn?
<< Anonymous
Anonymous Reply
All GY effect that doesn't have the clause "(Quick effect)" or "during either player turn..." can only be activated during your main phase. Only trap's GY effect (like U.A. Penalty box) can be activated anytime.
<< Anonymous
Anonymous Reply
Its not chaining towards treacherous , but rather active right after treacherous resolves. Thats also a reason neos didnt get destroyed after being struck by divine wrath, in spite of being a counter trap. He still get his eff negated tho. This is he same case with neos fusion protection eff.
<< Anonymous
Anonymous Reply
BTw in case of enemy turn, you should notice neos fusion and this card has a huge difference. Neos fusion protection is being actived in RESPONSE to neos destruction, meanwhile this card has to be actived manually beforewards. It is not responding to anything, which mean you cant use it during ur opp turn.
<< Anonymous
Anonymous Reply
usually, "WHEN or DURING " is included in the card desc in case of it being activated in some specific situation, such as enemy turn, yours, or both.
Am I missing something, or is it a bug that I cannot activate Diamond Core from the grave after I use my skill?
<< Anonymous
Anonymous Reply
You use sealed tomb right of course you have to banish this card first before using this skill that's why u can't banish this card
<< Anonymous
Anonymous Reply
But why is that? Unless I'm 🔥 and cannot read, I can activate the skill and card in any order.
<< Anonymous
Anonymous Reply
Never mind, I see it now. "Neither" player can banish cards after the skill is activated. I'm stupid.

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Comments (updated every hour)

Can its effect activate when it's sent from the deck to graveyard?
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I don't know why people say Cloudian Ra doesn't work, it definitely works in my experie...
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